Cut-off gas-burner



A. 0. AUSTIN.

GUT-OFF GAS BURNER,-

(No Model.)

Patented May 6,1884.

FIGl

WITNESSES INVENTD R N PETERS, Plwlo-Lllhngmpher. Wnhinglon. D. c.

UNITE STATES PATENT 'Orrrcn.

ALVAH o. AUSTIN, or SAN FRANCISCO, CALIFORNIA.

-CUT-OFF GAS-BURNER.

SPECIFICATION forming part of Letters Patent No. 298,052, dated May 6,1884.

Application filed June, 1883. (No model.)

To all whom it may concern.-

Be it known that I, ALvArr G. AUSTIN, a citizen of the United States,and a resident of San Francisco, State of California, have invented anew and Improved Automatic Gutv OE Gas-Burner, of which the following isa specification.

My inv ention relates to all gas-burners which are liable to be leftwith the gas, unburned, full fiowingtherethrough, thus causing waste andincurring great danger to life and'property.

The object of the invention is to shut off the flow of gas when, throughaccident, ignorance, or mistake, the gas is blown out or, having beenproperly turned off, is afterward inadvertently turned on again.

In the accompanying drawings, making part of this specification, Figures1, 2, and'3 are side elevations of my burner, illustrating my cut-off inthree different positions. Fig. 4 is a plan.

The same letters of reference representthe same parts in all thefigures.

A is the ordinary tap .or turn cock, which shuts off and turns on thegas.

Bis the bell-mouth, which screws upon the pipe which conveys the gas tothe tap.

G is the ordinary lava-tip.

D is the pipe, formed in the shape of an ob; long frame which connectsbetween the tap and the bell-mouth E, into which the lava-tip isinserted.

F (shown in dotted lines) is my auxiliary shutoff valve, which has itsappropriate seat within the bell-mouth E, as shown. G is my bellcrank,which operates this auxiliary shut-off valve.

H is my expanding disk or drum, which may be made of finely-spun brassand have a corrugated periphery; or it may be made of fine steel,somewhat as the expanding coil. of the ordinary steam-gage is made.

I is the trip-pin projecting from the shank of the tap A, and whichthrows out the lower end of the bell-crank to lift the auxiliary valvewhenever the tap is turned off. The bearing J for the shaft or spindleof the bellcrank G is soldered on the top of the disk. The bellcrank mayhave one or both limbs made of spring-steel, so as to yield slightly topermit the tap to be turned off when the bell-crank is in the positionas shown in Fig. 1. It must, however, be stiff enough to raise theauxiliary valve when moved to position, as shown .in Fig. 3.

The operation of my device is asfollows: Let us say the gas has justbeen blown out and the tap not turned off. The position of the partswill be, at the moment of extinguishing the flame, as shown in Fig. 1,because the heat of the flame has previously caused the expansion of thedrum, and having raised the fulcrum and brought the horizontal limb ofthe bellcrank against the upper part of the frame, this limb has beenforced down to its true horizontalposition, and the other limb forced inagainst the shank of the tap-plug. When,

in this position, the surrounding atmosphere I begins to cool and thedrum contracts, the horizontal limb of the bell-crank recedes and thestem of the valve F follows down until the valve itself rests-upon itsseat and shuts off the flow of gas, the positionof the parts at thistime being as shown in Fig. 2. Subsequently, when it is required torelight the gas, the valve F is first reopened by shutting off the tapA, as in Fig. 3, afterward turning it on to let the gas flow.

The bell-crank must be properly proportioned and rather tight in itsbearings to insure its remaining in any position it may be left in. Itmust not be so loose as to fall in and drop the valve F.- \Vhen beinginposition as shown in Fig. 3, the key of the tap is turned vertically.

The expansion-drum should be filled with ether or some other sensitiveelement.

The stem of the valve F may have a stuffingbox, if found necessary; butif so, then the stem of the valve and the end of the limb of blown outbefore it has burned thirty seconds. pansion-druin H, and trip-pin I,arranged and 10 Various forms of the parts may be easily (10- operatingin connection with the ordinary vised, the shapes and arrangements hereshown parts of a gas'bnrner, substantially as and for being, however,fully illustrative of the 1)rinthe purpose herein described.

5 ciple of my invention. r That I claim to be my invention is as fol-ALVA'H AUSTIL' lows: Witnesses:

The automatic gas cut-off herein described, GEORGE PARDY, consisting ofthe valve F, bell-crank G, ex- GEO. F. SCHORR.

